Power-table and power attachment for tables.



. No. 828,083. PATENTED.AUG.7, 1906. Q4 J. T. & D. BESWIOK.

POWER TABLE AND POWER ATTACHMENT FOR. TABLES. APPLICATION FILED JAN. 24.1906.

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UNIT D STATES PATENT OFFTGE.

JOHN TOM BESWICK AND DAVID BESWICK, OF NEW YORK, N. Y.

I POWER-TABLE AND POWER ATTACHMENT FOR TABLES.

Specification of Letters Patent.

Patented Aug. 7, 1906.

Application filed January 24,1906. Serial No. 297,598.

like of the class now commonly employed as supporting stands for lightrunning machines. of various kinds.

The inventionis designed to provide a compact portable attachment whichwill be complete, self-contained, and capable of being i readily set upand connected. to drive a sewing-machine, polishing-wheel, small lathe,or the like and which further will serve when in position as asupport'for the table or bench upon which the machine is mounted.

The preferred form and arrangement of mechanism embodying our inventionis illustrated in the accompanying drawings, in which Figure 1 is aperspective view of a powertable, showing our invention applied thereto.Fig. 2'is a sectional elevation of the power attachment, the view beingtaken on'the line '8 s of Fig. 3; and Fig. 3 is a similar view taken onthe line 8 s of Fig. 2.

Referring now to the drawings, 1 represents a standard which serves as asupport for the mechanism of the attachment and is preferably formed ofa piece of tubing of a length suitable for use as the leg of a table,bench, or the like.

The standard is provided with terminal castings 3 and 4, which may be ofthe form shown in Figs. 1 and 2 or of any other shape desired.

When the attachment is assembled in part with the table, as in Fig. 1,the standard is threaded, pinned, or otheriwse secured in the terminalcastings; but when in the portable form, as in Figs. 2 and 3, thestandard is adjustably secured in the upper casting by one or moreset-screws 5 in order that its efieetive length may be varied asrequired in fitting it to a table, bench, or the like.

A bracket 6, adjustably secured to the standard by means of set-screws7, serves as a support for an electric motor 8 and a rheothe oppositedirection by a spring 22.

stat 9, both of which are bolted or otherwise secured thereon. The motorand rheostat are well-known types now in general use, and it will not,therefore, be necessary to describe the same in detail.

Grooved pulleys 10 are keyed. upon opposite ends of the motor-shaft 11,and around either of these pulleys a belt may be passed and carriedupward through openings in thetable to the driving-wheel of the machinemounted thereon. Cooperating with the inner pulley 10 there is abrake-lever 12, which is ivoted at 13 upon a bracket 14, adjustabi ysecured to the standard by a set-screw 15. The lever 12 is provided witha terminal brake-shoe 16, which is ofiset and shaped to cooperate withthe pulley without interfering with the driving-belt when power is takenfrom the inner end of the motor-shaft. A spring 17, engaging the lever12, acts to hold the shoe clear of'the pulley when the brake is thrownoff.

A rod 18, pivoted to the operating-lever 19 of the rheostat, extendsupward through an opening in the free end of the brake-lever and hasadjustably secured thereon a collar 20, by means of which the lever isgiven movement in opposition to the spring 17 when the rod is pushedupward to apply the brake. As arranged, movement of thcrod 18 in onedirectioni. a, downward-closes the motor-circuit through the rheostatand throws off the brake, and as such movement is continued theresistance is cut out, more current flows, and the speed of the motorincreases. Upon reversing the movement of the rod 18 the resistance isagain thrown in, the speed of the motor is reduced, and the brake isfinally applied as the rod reaches its normal position.

Any suitable controlling means may be employed for shifting the rod 18;but for convenience it is preferably given movement in one direction bya foot-treadle 21 and in The treadle 21 is pivoted in lugs 23, securedeither directly to the floor, as in Fig. 2, or to a cross-rod 24 of thesupporting-fran1e of the table, and through an adjustable extension 25is connected with a singila egrtensioggfi gfi w.

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serves normally to maintain the same in a position to-open the circuitand apply the brake. An ordinary snap-switch 28 is provided on therheostat-bracket for cutting ofi the current when the machine is not inuse.

The operation, advantages, &c., of our invention will be apparent fromthe foregoing description.

Having thus described our invention, we claim 1. The combination of asupport, an electric mot-or, a motor-brake and a rheostat mounted uponbrackets adjustably secured to the support, and a spring-retractedcontrolling device connected to operate both the rheostat and the brake.

2. The combination of a support, an electric motor, a motor-brake and arheostat separately mounted upon brackets adjustable on the support, anda spring-retracted foottreadle connected to simultaneously operate boththe rheostat and the brake.

3. The combination of a support, an electric motor, a motor-brake and arheostat separately and independently mounted upon brackets adjustableon the support,.and a device connected and movable in one direction tosimultaneously close the motor-circuit through the rheostat and throwoff the brake.

4. The combination of a support, an electric motor, a motor-brake and arheostat carried by the support, an operating-lever for the brake, aspring tending to throw off the brake,an operating-lever forthe'rheostat, and a second spring connected to control both levers andopposing the action of the first-named spring.

5. The combination of a support, an electric motor, a motor-brake and arheostat car ried by the support, an operating-lever for the brake, aspring acting to throw off the brake, an operating-lever for therheostat,

and a manually-operateddevice connected to control both levers.

6. The combination of a support, an electric motor, a motor-brake and arheostat carried by the support, an operating-lever for the brake, aspring actin to throw off the brake, an operating-lever or the rheostat,a second spring connected to control both levers and opposing the actionof the first named spring, and means for overcoming said second spring.

7. The combination of a support, an electric motor, a motor-brake and arheostat carried. by the support, an operating-lever for the brake, aspring actingto throw off the brake, an operating-lever for therheostat, a manually-operated device connected to control both levers,and aretractile spring cooperating therewith.

8. The combination of a standard, an adjustable bracket thereon, anelectric motor and rheostat carried by the bracket, a motor-brake, aspring acting to throw off the brake, a member connected to control boththe rheostat and the brake and a second spring coactingwith said member.

9. The comblnation of an extensible standard, an adjustable bracketthereon, an electric motor and rheostat carried by the bracket, amotor-brake adjustably mounted upon the support independent of the motorand rheostat, a spring-retracted rod extensible in length and connectedto operate both the rheostat and the brake, and a foot-treadlccontrolling the rod.

In testimony whereof We afiix our signatures in the presence of twowitnesses.

JOHN TOM BESWICK. DAVID BESWICK.

Witnesses:

W. H. PUMPHREY, CHARLES D. GREEN.

